NimBank is an open source tool to custom the Maschine user library (modify name, add bank, sub-bank, ... )
You can find the v4 release here : https://denivel.blogspot.com/2023/01/nimbank-tool-update-40.html
And a tutorial here : https://denivel.blogspot.com/2016/03/add-product-and-bank-to-your-own-librar.html
Enjoy...